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(No Model.) a Sheets-Sheet 1.

' L. A. PARRO MACHINE FOR FORGING 0R H BRING METAL.

No. 523,050. Patented-July 17, 1894.

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' a Sheet-Sheet 2. I L. A. PARROCK. MACHINE FOR FORGING 0R HAMMERINGMETAL. N0. 523,050.

Patented July 1'7, 1894.

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(No Model.) 3 Sheets-Sheet 3.

L.A.PARROGK. MACHINE FOR FORGING 0R HAMMERING METAL. No. 523,050.Patented July 1'7, 1894. FIGS.

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NITED STATES PATENT I OFFICE.

LLEWLLEYN AUGUSTUS PARROOK, OF BIRMINGHAM, ENGLAND;

MACHINE FOR FORGING OR HAMMERING METAL.

SPECIFICATION forming part of Letters Patent No. 523,050, dated July 17,1894.

Application filed October 2, 1893.- Serial No. 486,985"- (No model.)Patented in England October 23,1890, No. 16,952.

To all whom it mag concern:

Be it known that I, LLEWLLEYN AUeUsTus PARROOK, a citizen of England,and a subject of Her Britannic Majesty, residing at 264 Victoria Road,Aston, Birmingham, England, have invented a new and useful Improvementin or Relating to Machinery to be Employed in the Forging or Hammeringof Metals, (for which I have obtained a patent in Great Britain, No.16,952, bearing date October 23, 1890,)

- of which the following is a full, clear, and exact description,reference being had to the accompanying sheets of drawings, and to theletters of reference marked thereon.

My invention has reference to hammers of the kind known as tilt hammersin which the hammer head is at the extremity of a lever and moves in thearc of a circle, the end of the lever remote from the hammer head beingactuated by a cam. Most tilt hammers are levers of the third order butin a hammer or machine constructed according to my invention the hammerhead is at the outer extremity of the long arm of an unequal armed leverof the first order. The lever has a short projection at or nearly atright angles to its general direction and close to its fulcrum, thusmaking virtually a combined first order lever and a bell crank leverwith one long arm the extremity of which carries the hammer head and oneshort arm. The end of the short arm of this bell crank is formed so asto engage with a suitable cam or wiper on a revolving shaft, so thatevery time that the projecting part of the cam engages with the shortarm the hammer head is raised. I prefer to use a short revolving shaftwith each hammer driving it by means of spur gearingwheels from a lineshaft. At the same time that the hammer head is raised, the end of thefirst order lever which is farthest from the hammer head is depressedand while being hammer head and partly to the elasticity of the springwhich was put into a state of stress by the descent of the short end ofthe hammer lever.

By means of suitable levers and a treadle actuated by the foot of theworkman that part of the force of the blow which is due to the action ofthe spring may be increased or diminished. j

I provide a stop whereby the hammer may be retained in its highestposition when desired for the purpose of changing the work on the anviland keeping the hammer at rest. This movable stop I actuate bypreference by means of a handle placed conveniently to the hand of theworkman though it might be worked by another treadle if preferred.

The spring may be made in diiferent modes but I prefer to make ithelical and inclosed in a case with a disk or plunger pressing upon itabove and below the plunger above being pressed down by the short ortail end of the hammer lever and the plunger below being actuated bymeans of the treadle levers. The spring may be arranged so as to beextended instead of compressed when being actuated by the tail end ofthe lever.

Figure 1 is a view in side elevation sectional showing improvements inor relating to machinery to be employed in the forging or hammering ofmetals as my invention. Fig. 2 is an end view elevation of same. Fig. 3is a plan view of same.

The mechanical parts for actuating the hammer are supported by thestandards a. upon the bed b.

c. is the unequal lever carrying the hammer head d. on the longer part,the short arm 0'. receives the carrier e. taking its fulcrum at e. andcarries the form or segment f. which engages with the segments or formsg. g. g. g. keyed or otherwise connected to h. forminga cam or wiperfixed upon the revolving shaft 1'. so that at each time as g. comes incontact with f. in its revolution 0. and d are raised the means ofcommunicating the motion would by preference be effected by usingspur-gear ingj and pulleys 7",j'.

J is the fly-wheel upon the shaft 2' at the time that c. with d. israised. 0'. is lowered,

and engaging the rod or upper plunger Z. with disk m. the spring a.which is incased in 0. is put into a state of stress by the longitudinalpressure given. When the cam or wiper segment g. in its revolution hascleared the form f., d. instantly falls upon the article, upon the anvilp, which is to be hammered or forged, and so continuously as required.

The power or force of the blow or fall of d. may be increased whenrequired by the employment of the lever q. jointed at a". actuated bythe foot of the workman at s. the cupped part twhich engages the rodwith disk of lower plunger Lthe spring n receives a further stress.

When the hammer d. is required to be fixed chiefly for changing the workI employ the stop M. which engages with 12. being actuated by means ofthe handle 10. and the jointed levers y.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is 1. In a power hammer, the combination, with the pivotedlover a carrying the hammer head and provided with the rearwardextension 0', and the segment f below its pivot; of a spring operatingon the said extension to increase the force of the blow, and a pivotedlever for adjusting the strength of the spring, substantially as setforth.

2. In a power hammer, the combination, with the pivoted lever c carryingthe hammer head and provided with the rearward extension 0, of alongitudinally-adjustable helical spring arranged under the saidextension and operating to increase the force of the blow to a greateror less extent as required, and a pivoted lever for adjusting the saidspring, substantially as set forth.

3. In a power hammer, the combination, with the standards a, of thehammer lever pivotally supported by the said standards and provided withthe projection o, the handle y pivoted in one of the said standards andprovided with a cam-shaped stop t6, arranged under the said projection,a pivoted lever at the front of the anvil, and a rod pivoted to thelever and handle for operating the said handle, substantially as setforth.

In testimony whereof I affix my signature in the presence of twosubscribing witnesses.

LLEWLLEYN AUGUSTUS PARROCK. [L. 8.]

Witnesses:

THOMAS KENDRICK, ALFRED KENDRICK.

